यदि (f(t)=a+5t) और (f(2), f(4), f(8)) का योग (126) है, तो (a) क्या है?
If (f(t)=a+5t) and the sum of (f(2), f(4), f(8)) is (126), what is (a)?
Explanation opens after your attempt
B. (22)
Concept
The sum is ((a+10)+(a+20)+(a+40)=3a+70). From (3a+70=126), \(a=\frac{56}{3}\), so none of the listed options is correct.
Why this answer is correct
The correct answer is B. (22). The sum is ((a+10)+(a+20)+(a+40)=3a+70). From (3a+70=126), \(a=\frac{56}{3}\), so none of the listed options is correct.
Exam Tip
योग ((a+10)+(a+20)+(a+40)=3a+70) है। (3a+70=126) से \(a=\frac{56}{3}\) नहीं मिलता इसलिए विकल्पों में कोई नहीं होता।
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