Math, asked by shantamDey8198, 10 months ago

Ap24,21,18....... Ke kitne pad liye jaye ki unka yogphal 78 ho

Answers

Answered by dhruvrohilla
0

Step-by-step explanation:

a1=24

d=-3

an=78

an= a1+(n-1)d

78=24+(n-1)-3

54=-3n +3

n=51/3

n=17

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