5. Constructions should be neat and exactly as perpermitted.the given

5. Constructions should be neat and exactly as perpermitted.the given measurementSECTION-AAfter how many decimal places will the decimal expansion of 21x 53terminate43ORWhat is the HCF of the smallest composite number and the smallest primenumber2 If one root of 5x213x + k O is the reciprocal of the other root, then findwalue of k.3 Which of the term of A.P. 5, 2, 1...4is-49?The ordinate of a point A on the y- axis is 5 and B has co- ordinates (-3,1Find the length of AB5 If tan Afind the value of (sin A+ cos A) sec A?12Î ABC is such that AB-3 cm, BC= 2cm, CA-2.5cm. If ÎDEF-a ABC andEF 4cm, then find perimeter of ADEF.6 cmOR

Answer»

For AP 5, 2, - 1.........nth termtn = a + (n - 1)d

a = 5, d = 2-5 = - 3

Let mth term of AP is - 49

Then,-49 = 5 + (m - 1)*-3-49 = 5 - 3m + 3-49 - 8 = - 3m3m = 57m = 57/3 = 19

Therefore, 19th term of given AP is - 49