यदि (Z(x)=b-10x) रेखीय क्षय है और (Z(2)+Z(7)=130), तो (b) क्या है?
If (Z(x)=b-10x) is linear decay and (Z(2)+Z(7)=130), what is (b)?
Explanation opens after your attempt
C. (110)
Concept
(Z(2)+Z(7)=(b-20)+(b-70)=2b-90). From (2b-90=130), (b=110).
Why this answer is correct
The correct answer is C. (110). (Z(2)+Z(7)=(b-20)+(b-70)=2b-90). From (2b-90=130), (b=110).
Exam Tip
(Z(2)+Z(7)=(b-20)+(b-70)=2b-90) है। (2b-90=130) से (b=110) मिलता है।
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