1.

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

Answer» K= 10+(-2)/2. 8-2/2=4
K-10=-2-kK+k=-2+102k=8K=4
An = a +(n-1)d => -2 = 10+(3-1)×(k-10) => -2 = 10+2k-20 => -2 +10 = 2k =>k =8/2 => k = 4.
4
K-10=-2-k. || 2k=8. || K=4


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