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If 10,k,-2 are in AP then …

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If 10,k,-2 are in AP then find the value of k

Posted by Secret Star🌠🌠🌠🌠 6 years, 3 months ago

CBSE > Class 10 > Mathematics

5 answers

Vishal Vishal 6 years, 3 months ago

K= 10+(-2)/2. 8-2/2=4

Manish Jaiswal 6 years, 3 months ago

K-10=-2-k K+k=-2+10 2k=8 K=4

Aadya Singh ? 6 years, 3 months ago

An = a +(n-1)d
=> -2 = 10+(3-1)×(k-10)
=> -2 = 10+2k-20
=> -2 +10 = 2k
=>k =8/2 => k = 4.

Pk . 6 years, 3 months ago

4

Lucifer ? Morningstar? 6 years, 3 months ago

K-10=-2-k. || 2k=8. || K=4

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