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4 results found for "direct value" in Class 10.
यदि \(S_n=n^2+4n\), तो \(S_{20}\) का मान क्या होगा?
If \(S_n=n^2+4n\), what is the value of \(S_{20}\)?
Explanation opens after your attempt
Step 1
Concept
(S_{20}=202+4(20)=480). In such a question, there is no need to find (a) and (d) separately.
Step 2
Why this answer is correct
The correct answer is C. (480). (S_{20}=202+4(20)=480). In such a question, there is no need to find (a) and (d) separately.
Step 3
Exam Tip
(S_{20}=202+4(20)=480)। ऐसे प्रश्न में अलग से (a) और (d) निकालने की जरूरत नहीं है।
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यदि \(\frac{x+y}{3}=7\) और \(\frac{x-y}{4}=2\), तो (x-y) का मान क्या है?
If \(\frac{x+y}{3}=7\) and \(\frac{x-y}{4}=2\), what is the value of (x-y)?
Explanation opens after your attempt
Step 1
Concept
The second equation directly gives (x-y=8). In exams, the asked expression is sometimes obtained directly.
Step 2
Why this answer is correct
The correct answer is C. (8). The second equation directly gives (x-y=8). In exams, the asked expression is sometimes obtained directly.
Step 3
Exam Tip
दूसरा समीकरण सीधे (x-y=8) देता है। परीक्षा में कभी-कभी पूछे गए व्यंजक का मान सीधे मिल जाता है।
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समीकरणों (x+y=15) और (y=6) से (x) कितना होगा?
From (x+y=15) and (y=6), what is (x)?
Explanation opens after your attempt
Step 1
Concept
Putting (y=6) gives (x+6=15), so (x=9). Check the final answer even in simple equations.
Step 2
Why this answer is correct
The correct answer is C. (x=9). Putting (y=6) gives (x+6=15), so (x=9). Check the final answer even in simple equations.
Step 3
Exam Tip
(y=6) रखने पर (x+6=15), इसलिए (x=9)। सरल समीकरणों में भी अंतिम उत्तर जांचें।
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यदि (x+y=12) और (x=7), तो (y) का मान क्या है?
If (x+y=12) and (x=7), what is the value of (y)?
Explanation opens after your attempt
Step 1
Concept
Putting (x=7) gives (7+y=12), so (y=5). Use the given variable value directly.
Step 2
Why this answer is correct
The correct answer is C. (y=5). Putting (x=7) gives (7+y=12), so (y=5). Use the given variable value directly.
Step 3
Exam Tip
(x=7) रखने पर (7+y=12), इसलिए (y=5)। दिए हुए चर का मान सीधे प्रयोग करें।
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