Arithmetic 44181

Determine the arithmetic sequence.

a3 + a4 = 10
a2 + a5 = 11

Correct answer:

a1 =  5.5
d =  0

Step-by-step explanation:

a2+a4=11 a2+a5=11  a1+d+(a1+3d)=11 a1+d+(a1+4d)=11  a1+d+(a1+3 d)=11 a1+d+(a1+4 d)=11  2a1+4d=11 2a1+5d=11  Row2Row1Row2 2a1+4d=11 d=0  d=10=0 a1=2114d=211=5.5  a1=211=5.5 d=0



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