यदि (F(t)=45+rt) और (F(2)=F(9)-63), तो (r) क्या है?
If (F(t)=45+rt) and (F(2)=F(9)-63), what is (r)?
Explanation opens after your attempt
C. (9)
Concept
(F(9)-F(2)=7r). From (7r=63), (r=9).
Why this answer is correct
The correct answer is C. (9). (F(9)-F(2)=7r). From (7r=63), (r=9).
Exam Tip
(F(9)-F(2)=7r) है। (7r=63) से (r=9) मिलता है।
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