23. The list of numbers -10, -6, -2, 2, … is [NCERT Exemplar Problems]
(а) an AP with d = -16
(b) an AP with d = 4
(c) an AP with d = -4
(d) not an AP
24. Two APs have the same common difference. . The first term of one of these is -1 and
that of the other is -8. Then the difference between their 4th terms is [NCERT Exemplar
Problems]
(a) -1
(b) -8
(c) 7
(d) -9
25. In an AP, if d = -2, n = 5 and an = 0, the value of a is
(a) 10
(b) 5
(c) -8
(d) 8
CHAPTER 6
TRIANGLES
1. O is a point on side PQ of a APQR such that PO = QO = RO, then
(a) RS² = PR × QR
(b) PR² + QR² = PQ²
(c) QR² = QO² + RO²
(d) PO² + RO² = PR²
Answers
Answered by
2
Answer:
23. an Ap with d = 4
24. 7
25. 8
because An = a + (n -1)d
0 = a + (5-1)(-2)
0 = a +(-8)
0 = a - 8
a = 8
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